package com.hongyi.system.controller;


import com.github.xiaoymin.knife4j.annotations.ApiSort;
import com.google.code.kaptcha.Producer;
import com.hongyi.common.framework.constant.CacheConstants;
import com.hongyi.system.domain.vo.CaptchaVo;
import com.hongyi.common.framework.domain.JsonResult;
import com.hongyi.common.framework.utils.Base64Utils;
import com.hongyi.common.framework.utils.IdUtils;
import com.hongyi.common.redis.utils.RedisUtils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;



/**
 * 验证码操作处理
 * 
 * @author DingHao
 */
@ApiSort(value = 1)
@Api( tags = "验证码处理接口")
@RestController
@RequestMapping("/captcha")
public class CaptchaController
{
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    //验证码使用开关
    @Value("${captcha.enable}")
    private boolean captchaEnable;

    //验证码有效期
    @Value("${captcha.captchaExpiration}")
    private Integer captchaExpiration;

    //验证码类型
    @Value("${captcha.captchaType}")
    private String captchaType;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    @ApiOperation("生成验证码")
    public JsonResult<CaptchaVo> getCode()
    {
        //如果验证码使用开关关闭,直接返回结果
        if (!captchaEnable)
        {
            return JsonResult.ok();
        }
        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;

        String capStr = null, code = null;
        BufferedImage image = null;

        //根据验证码类型生成图片信息
        if ("math".equals(captchaType))
        {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        }
        else if ("char".equals(captchaType))
        {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        //验证码code存储到换成
        RedisUtils.setCacheObject(verifyKey, code, captchaExpiration, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try
        {
            ImageIO.write(image, "jpg", os);
        }
        catch (IOException e)
        {
            return JsonResult.fail(e.getMessage());
        }
        CaptchaVo captchaVo = new CaptchaVo();
        captchaVo.setUuid(uuid);
        captchaVo.setCode(code);
        captchaVo.setImg(Base64Utils.encode(os.toByteArray()));
        return JsonResult.ok(captchaVo);
    }
}
